How Websites Detect JavaScript, Why Your Scraper Trips Site-Specific Errors, and What You Can Do
https://technivorz.com/why-regular-x-users-suddenly-hit-a-javascript-error-and-then-cant-get-back-in/
5 Practical Questions About JavaScript Detection and Selective Blocking Everyone Asks Quick setup: you hit a site, things look normal, then you get a weird site-specific error, or an access block that says something like "suspicious traffic